Celeb Hookups: Michael Phelps and Nicole Johnson

The entire cast and crew from "Eclipse" went to the show and dined out at sushi restaurant Miku, where the two co-stars sat close to one another during dinner. They were seen taking smoke breaks and leaving together, the magazine reported.

Robert, 23, and Kristen, 19, were then spotted cozying up at a Kings of Leon concert and laughing together.

"If they want to date each other, fine!" Billy Burke, who plays Stewart's dad, told Us. "Look, when you're that age, you're going to make mistakes. You're going to date people you probably shouldn't date. It's all part of the growing process."